The Lua target enables the following define flags for the Haxe complier:
-D lua_ver
Enable special features for a specific Lua version. Currently, this flag will enable extern methods that are specific to certain versions (e.g. table.pack in Lua > 5.2).-D luajit
Enable special features for LuaJIT. Currently this flag will enable the jit
and ffi
module namespaces.